i'm experiencing a problem with preconditions. í use the precondition of files to track the downloading of these. if >i upload ppt's or doc's there aren't any problems. when i download i get one line in my logfile. if i download a pdf >then the log shows 2 entries. to judge from the time the first is when the download starts an the secon when it >ends.

anybod got an idea on why this is happening?

Just for what it's worth: you can have even more than 2 lines in your log when someone is downloading a pdf file. If the document is not 'saved as', but viewed per page you can have even 7 or 10 lines in your log, one line for every page the user views. It is nog Zope specific. Hans de Wit Stichting Farmaceutische Kengetallen Postbus 30460 2500 GL DEN HAAG Tel. 070-3737448 Fax 070-3737445